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100%);--interactive-secondary: #34c759;--interactive-secondary-hover: #28a745;--message-sent-bg: linear-gradient(180deg, #42a5f5 0%, #007aff 100%);--message-sent-text: #ffffff;--message-received-bg: #e9e9eb;--message-received-text: #1c1c1e;--message-timestamp-sent: rgba(255, 255, 255, .8);--message-timestamp-received: #8e8e93;--shadow-sm: 0 1px 1px rgba(0, 0, 0, .04);--shadow-md: 0 2px 4px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1);--shadow-header: 0 1px 0 rgba(0, 0, 0, .1);--shadow-message: none;--search-highlight-bg: #ffcc00;--search-highlight-text: #1c1c1e;--search-match-ring: #007aff;--search-match-ring-secondary: #ff9500;--scrollbar-track: #f2f2f7;--scrollbar-thumb: #c7c7cc;--scrollbar-thumb-hover: #aeaeb2;--contact-selected-bg: #e3f2fd;--contact-hover-bg: #f2f2f7;--contact-avatar-gradient: linear-gradient(180deg, #42a5f5 0%, #007aff 100%)}[data-theme=material3]{--surface-background: #fef7ff;--surface-card: #ffffff;--surface-elevated: #f3edf7;--surface-overlay: rgba(0, 0, 0, .4);--text-primary: #1d1b20;--text-secondary: #49454f;--text-tertiary: #79747e;--text-inverse: #ffffff;--border-default: #cac4d0;--border-light: #e7e0ec;--border-focus: #6750a4;--interactive-primary: #6750a4;--interactive-primary-hover: #7965af;--interactive-primary-gradient: linear-gradient(135deg, #6750a4 0%, #9c27b0 100%);--interactive-secondary: #0ea5e9;--interactive-secondary-hover: #0284c7;--message-sent-bg: linear-gradient(135deg, #6750a4 0%, #7c4dff 100%);--message-sent-text: #ffffff;--message-received-bg: #e7e0ec;--message-received-text: #1d1b20;--message-timestamp-sent: rgba(255, 255, 255, .7);--message-timestamp-received: #79747e;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05), 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 1px 2px rgba(0, 0, 0, .1), 0 4px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 2px 4px rgba(0, 0, 0, .1), 0 8px 16px rgba(0, 0, 0, .15);--shadow-header: 0 1px 2px rgba(0, 0, 0, .1), 0 2px 6px rgba(0, 0, 0, .1);--shadow-message: 0 1px 2px rgba(0, 0, 0, .05);--search-highlight-bg: #e8def8;--search-highlight-text: #1d1b20;--search-match-ring: #6750a4;--search-match-ring-secondary: #b69df8;--scrollbar-track: #f3edf7;--scrollbar-thumb: #cac4d0;--scrollbar-thumb-hover: #aea9b4;--contact-selected-bg: #e8def8;--contact-hover-bg: #f3edf7;--contact-avatar-gradient: linear-gradient(135deg, #6750a4 0%, #9c27b0 100%)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInFromLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInFromRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInFromBottom{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes highlightPulse{0%{box-shadow:0 0 #0ea5e980}50%{box-shadow:0 0 0 8px #0ea5e900}to{box-shadow:0 0 #0ea5e900}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:var(--font-family);font-size:var(--font-md);line-height:1.5;background-color:var(--surface-background);color:var(--text-primary);transition:background-color var(--transition-slow),color var(--transition-slow);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}input[type=file]{display:none}.app-container{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-6);background:var(--interactive-primary-gradient);color:var(--text-inverse);height:64px;box-shadow:var(--shadow-header);z-index:100}.app-title{font-size:var(--font-2xl);font-weight:600;cursor:pointer;text-decoration:none;color:var(--text-inverse);letter-spacing:-.02em}.app-nav{display:flex;align-items:center;gap:var(--space-3)}.btn{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border:none;border-radius:var(--radius-lg);font-size:var(--font-md);font-weight:500;cursor:pointer;transition:all var(--transition-base);text-decoration:none;font-family:inherit}.btn-primary{background-color:#ffffff26;color:var(--text-inverse);border:1px solid rgba(255,255,255,.25);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.btn-primary:hover{background-color:#ffffff40;transform:translateY(-1px)}.btn-secondary{background-color:var(--surface-card);color:var(--interactive-primary);border:1px solid var(--border-default)}.btn-secondary:hover{background-color:var(--surface-background);border-color:var(--interactive-primary)}.main-content{flex:1;display:flex;overflow:hidden}.contacts-panel{width:320px;background:var(--surface-card);border-right:1px solid var(--border-default);display:flex;flex-direction:column;overflow:hidden}.contacts-header{padding:var(--space-4);border-bottom:1px solid var(--border-default)}.search-box{width:100%;padding:var(--space-3) var(--space-4);border:1px solid var(--border-default);border-radius:var(--radius-full);font-size:var(--font-md);font-family:inherit;outline:none;transition:all var(--transition-base);background-color:var(--surface-background);color:var(--text-primary)}.search-box:focus{border-color:var(--interactive-primary);box-shadow:0 0 0 3px #0ea5e91a}.search-box::placeholder{color:var(--text-tertiary)}.contacts-list{flex:1;overflow-y:auto;list-style:none}.contact-item{display:flex;align-items:center;padding:var(--space-3) var(--space-4);cursor:pointer;transition:all var(--transition-base);border-bottom:1px solid var(--border-light);animation:fadeIn .2s ease 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var(--space-6);font-size:var(--font-sm);font-family:inherit;color:var(--interactive-primary);cursor:pointer;transition:all var(--transition-base);box-shadow:var(--shadow-sm)}.load-more-btn:hover{background:var(--surface-background);border-color:var(--interactive-primary);box-shadow:var(--shadow-md)}.messages-list{flex:1;overflow-y:auto;padding:var(--space-4) var(--space-6);display:flex;flex-direction:column;gap:var(--space-2)}.message-bubble{max-width:70%;padding:var(--space-3) var(--space-4);border-radius:var(--radius-xl);font-size:var(--font-md);line-height:1.5;word-wrap:break-word;min-height:20px;display:block;animation:slideInFromBottom .2s ease forwards}.message-sent{align-self:flex-end;background:var(--message-sent-bg);color:var(--message-sent-text);border-bottom-right-radius:var(--radius-sm);box-shadow:var(--shadow-message)}.message-sent div{color:var(--message-sent-text)}.message-received{align-self:flex-start;background:var(--message-received-bg);color:var(--message-received-text);border-bottom-left-radius:var(--radius-sm);box-shadow:var(--shadow-message)}.message-received div{color:var(--message-received-text)}.message-time{font-size:var(--font-xs);margin-top:var(--space-1);opacity:.8}.message-sent .message-time{text-align:right}.message-bubble img{max-width:100%;border-radius:var(--radius-md);margin:var(--space-2) 0}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-tertiary);text-align:center;padding:var(--space-10);animation:fadeIn .4s ease forwards}.empty-state-icon{font-size:80px;margin-bottom:var(--space-6);opacity:.4;color:var(--interactive-primary)}.empty-state h2{font-size:var(--font-2xl);font-weight:600;margin-bottom:var(--space-2);color:var(--text-secondary)}.empty-state p{font-size:var(--font-lg);max-width:400px;color:var(--text-secondary)}.empty-state-hint{font-size:var(--font-md)!important;color:var(--text-tertiary)!important;margin-top:var(--space-4)!important}.settings-container{max-width:640px;margin:var(--space-10) auto;padding:0 var(--space-6);animation:fadeIn .3s ease forwards}.settings-card{background:var(--surface-card);border-radius:var(--radius-xl);padding:var(--space-6);box-shadow:var(--shadow-md);margin-bottom:var(--space-6)}.settings-card h2{font-size:var(--font-xl);font-weight:600;margin-bottom:var(--space-2);color:var(--text-primary)}.settings-description{font-size:var(--font-md);color:var(--text-secondary);margin-bottom:var(--space-5)}.form-group{margin-bottom:var(--space-5)}.form-group label{display:block;font-size:var(--font-md);font-weight:500;margin-bottom:var(--space-2);color:var(--text-secondary)}.form-group select,.form-group input{width:100%;padding:var(--space-3) var(--space-4);border:1px solid var(--border-default);border-radius:var(--radius-md);font-size:var(--font-md);font-family:inherit;outline:none;transition:all var(--transition-base);background-color:var(--surface-card);color:var(--text-primary)}.form-group select:focus,.form-group input:focus{border-color:var(--interactive-primary);box-shadow:0 0 0 3px #0ea5e91a}.theme-grid{display:grid;gap:var(--space-3)}.theme-card{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-4);background:var(--surface-background);border:2px solid var(--border-default);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-base)}.theme-card:hover{border-color:var(--interactive-primary);transform:translateY(-2px);box-shadow:var(--shadow-md)}.theme-card--selected{border-color:var(--interactive-primary);background:var(--contact-selected-bg)}.theme-card-icon{width:48px;height:48px;border-radius:var(--radius-lg);background:var(--interactive-primary-gradient);display:flex;align-items:center;justify-content:center;color:var(--text-inverse);flex-shrink:0}.theme-card-content{flex:1}.theme-card-name{font-weight:500;color:var(--text-primary);margin-bottom:var(--space-1)}.theme-card-description{font-size:var(--font-sm);color:var(--text-secondary)}.theme-card-check{color:var(--interactive-primary)}.settings-actions{margin-top:var(--space-6)}.app-footer{padding:var(--space-4) var(--space-6);background:var(--surface-card);border-top:1px solid var(--border-default);text-align:center;font-size:var(--font-sm);color:var(--text-secondary)}.app-footer a{color:var(--interactive-primary);text-decoration:none;font-weight:500}.app-footer a:hover{text-decoration:underline}@media(max-width:768px){.main-content{flex-direction:column}.contacts-panel{width:100%;max-width:100%;max-height:40vh;border-right:none;border-bottom:1px solid var(--border-default)}.messages-panel{flex:1;min-height:0}.app-nav{gap:var(--space-2)}.btn{padding:var(--space-2) var(--space-3);font-size:var(--font-sm)}.app-header{padding:0 var(--space-3);min-height:56px}.app-title{font-size:var(--font-xl)}.app-logo{font-size:28px}}@media(max-width:480px){:root{--font-xs: 10px;--font-sm: 12px;--font-md: 13px;--font-lg: 14px;--font-xl: 16px;--font-2xl: 18px;--font-3xl: 22px}.app-header{padding:0 var(--space-2);min-height:48px}.app-title{font-size:var(--font-lg)}.app-logo{font-size:24px}.app-nav{gap:var(--space-1)}.btn{padding:var(--space-1) var(--space-2);font-size:var(--font-xs)}.btn .material-icons{font-size:18px}.contacts-panel{max-height:35vh}.contacts-header{padding:var(--space-2)}.search-box{padding:var(--space-2) var(--space-3);font-size:var(--font-sm)}.contact-item{padding:var(--space-2)!important}.contact-avatar{width:36px;height:36px;font-size:var(--font-sm);margin-right:var(--space-2)}.contact-name{font-size:var(--font-sm)}.contact-phone{font-size:var(--font-xs)}.contact-badge{padding:2px 6px;font-size:10px;min-width:22px}.app-footer{padding:var(--space-2);font-size:var(--font-xs)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}.search-highlight{background-color:var(--search-highlight-bg);color:var(--search-highlight-text);padding:1px 3px;border-radius:3px;font-weight:500}.material-icons{font-family:Material Icons;font-weight:400;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr;-webkit-font-feature-settings:"liga";-webkit-font-smoothing:antialiased}